Hi, Devi!
Thank you for your message!
A long time ago, I have already created such a pack (click here to see it), however, it needs to be divided in half, because, backgrounds don't match each other (one is an old, grunge elementary school and the other, a beautiful modern college). I hope to divide this pack in a couple of days so that people can download only the part that they need. You may also want to check the art gallery pack, I think, some backgrounds would work too if your characters have art class or if you need some modern-looking corridor.
I'm hoping to release new school-related backgrounds soon, with a more modern-looking high school. Some of them will be made free after the requester's purchase, so, I will keep you updated about this. *^-^*
Rachel